Semiconductor device performing row hammer refresh operation
Disclosed herein is an apparatus that includes a memory cell array including a plurality of word lines each coupled to a plurality of memory cells, and a control circuit configured to activate first and second internal signals in a time-division manner in response to a first external command. A first number of the word lines are selected in response to the first internal signal, and a second number of the word line is selected in response to the second internal signal, the second number is smaller than the first number.
Latest Micron Technology, Inc. Patents:
This application is a continuation of U.S. application Ser. No. 16/818,989 filed Mar. 13, 2020, which is a continuation of U.S. application Ser. No. 16/788,657 filed Feb. 12, 2020, which is a continuation of U.S. application Ser. No. 16/208,217 filed Dec. 3, 2018. The aforementioned applications are incorporated herein by reference, in their entirety, for any purpose.
BACKGROUNDIf accesses are concentrated to the same word line in a semiconductor device such as a DRAM (Dynamic Random Access Memory), information storage characteristics of memory cells coupled to word lines adjacent to that word line may be decreased. To solve this problem, a refresh operation for the memory cells coupled to the adjacent word lines is sometimes performed in addition to the normal refresh operation to prevent loss of information of the relevant memory cells. This additional refresh operation is called “row hammer refresh”.
Generally, the row hammer refresh operation is performed so as to interrupt the normal refresh operation. Accordingly, if the frequency of the row hammer refresh operations is increased, it leads to a problem that the number of the normal refresh operations is reduced and the refresh cycle becomes longer.
Various embodiments of the present invention will be explained below in detail with reference to the accompanying drawings. The following detailed description refers to the accompanying drawings that show, by way of illustration, specific aspects and embodiments in which the present invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the present invention. Other embodiments may be utilized, and structural, logical and electrical changes may be made without departing from the scope of the present invention. The various embodiments disclosed herein are not necessary mutually exclusive, as some disclosed embodiments can be combined with one or more other disclosed embodiments to form new embodiments.
A semiconductor device 1 according to a first embodiment shown in
As shown in
The refresh signal AREF is supplied to a state control circuit 33. The state control circuit 33 activates internal signals REF, CBR, and RHR in a predetermined order when the refresh signal AREF is activated. The state control circuit 33 can be configured to receive a temperature signal TEMP set in a mode register 34 and switch the operation mode on the basis of the temperature signal TEMP. The internal signal CBR generated by the state control circuit 33 is a signal for performing a normal refresh operation. The internal signal CBR is supplied to a refresh counter 35. The refresh counter 35 holds an address CBRADD of a word line WL being a target of refresh operation. The value of the address CBRADD held in the refresh counter 35 is incremented or decremented each time the internal signal CBR is activated. In the present embodiment, upper three bits of the address CBRADD held in the refresh counter 35 are degenerated and therefore there are eight word lines WL corresponding to one address CBRADD. Meanwhile, the internal signal RHR is a signal for performing a row hammer refresh operation. The internal signal RHR is supplied to a row hammer address storing circuit 36. The row hammer address storing circuit 36 stores therein the address of a word line WL being a target of the row hammer refresh operation, or an address related thereto. For example, the address stored in the row hammer address storing circuit 36 may be the address itself of a word line WL to which accesses are concentrated, or may be the address of a word line WL adjacent to the word line WL to which accesses are concentrated. A plurality of addresses (four addresses, for example) are stored in the row hammer address storing circuit 36, and an output address RHRADD is switched each time the internal signal RHR is activated.
The address stored in the row hammer address storing circuit 36 is provided by a sampling circuit 37. The sampling circuit 37 samples the row address XADD at a timing when a sampling signal SAMP generated by an arm sample generator 38 is activated, and overwrites the sampled row address XADD in the row hammer address storing circuit 36. The arm sample generator 38 may activate the sampling signal SAMP at a timing when the active signal ACT has been activated a predetermined number of times. Accordingly, the address of the word line WL to which accesses are concentrated is stored in the row hammer address storing circuit 36.
The internal signals REF, CBR, and RHR, the active signal ACT, and the address signals XADD, CBRADD, and RHRADD generated by the control logic circuit 14 are supplied to the bank row logic circuit 12 allocated to a designated memory bank. As shown in
Meanwhile, respective upper bits (three bits in the present embodiment) of the address signals XADD and RHRADD are supplied to the selector 42. The selector 42 supplies bit data B0 to B2 being the upper bits of either the address signal XADD or the address signal RHRADD to the address decoder 43 on the basis of the active signal ACT and the internal signal RHR. The address decoder 43 decodes the bit data B0 to B2 to generate a selection signal SEL used for mat selection.
As shown in
As shown in
In the present embodiment, both the normal refresh operation and the row hammer refresh operation are thus performed sequentially in response to one per-bank refresh command REFpb and therefore the number of the normal refresh operations does not decrease. Accordingly, the refresh cycle is not elongated due to the row hammer refresh operation. Furthermore, because the row hammer fresh operation is performed each time the per-bank refresh command REFpb is issued, the execution frequency of the row hammer refresh operations is also increased. At the time of the row hammer refresh operation, only one word line WL is selected. Accordingly, increase in current consumption and noise occurring due to execution of the row hammer refresh operation can be minimized. In the example described above, the normal refresh operation and the row hammer refresh operation are performed in this order in response to the per-bank refresh command REFpb. However, the present invention is not limited thereto. Therefore, the row hammer refresh operation and the normal refresh operation can be performed in this order in response to the per-bank refresh command REFpb. The length of a word-line selection time (a sensing time in a sense amplifier) at a time when the internal signal CBR is activated can be longer than the length of a word-line selection time at a time when the internal signal RHR is activated considering that eight word lines are selected at the time of an activation of the internal signal CBR in the example described above and one word line is selected at the time of an activation of the internal signal RHR. This is because, when the internal signal CBR is activated, eight word lines are selected and it is therefore supposed that load is larger than that at a time of selection of one word line and that relatively long time is required. This control can be realized by delaying a timing of a control signal for deactivating the word lines in response to the internal signal CBR, for example, using a delay circuit.
In a semiconductor device 2 according to a second embodiment shown in
When the per-bank refresh command REFpb is issued, the row active signal is generated twice consecutively in the state control circuit 33. The internal signals REFU, CBRU, and RHRL are activated synchronously with the first activation of the row active signal, and the internal signals REFL, CBRL, and RHRU are activated synchronously with the second activation of the row active signal. Accordingly, the normal refresh operation is performed to the group GU and the row hammer refresh operation is performed to the group GL in response to the first activation of the row active signal. In response to the second activation of the row active signal, the normal refresh operation is performed to the group GL and the row hammer refresh operation is performed to the group GU.
For example, when the per-bank refresh command REFpb designates the memory bank BANK0, the mats MAT0 to MAT3 of the memory bank BANK0 are all selected in response to the first activation of the row active signal, and the word lines WL0 to WL3 indicated by the address signal CBRADD output from the refresh counter 35 are simultaneously selected and a word line WLa which is indicated by the address signal RHRADD output from the row hammer address storing circuit 36 is selected from among the word lines WL included in the mats MAT4 to MAT7 as shown in
As described above, in the present embodiment the normal refresh operation of selecting four word lines WL and the row hammer refresh operation of selecting one word line WL are simultaneously performed and the above operations are performed twice consecutively. Therefore, the number of word lines WL selected by one operation is reduced, which can suppress the peak current. Furthermore, because the row hammer refresh operation is performed twice in response to one per-bank refresh command REFpb, the execution frequency of the row hammer refresh operations is doubled as compared to that in the semiconductor device 1 according to the first embodiment.
In a semiconductor device 3 according to a third embodiment shown in
In the present embodiment, the operation performed when the per-bank refresh command REFpb is issued is the same as the operation explained with reference to
For example, when the per-bank refresh command REFpb designates the memory bank BANK0, the mats MAT0 to MAT3 of the memory bank BANK0 are all selected in response to the first activation of the row active signal, and the word lines WL0 to WL3 indicated by the address signal CBRADD output from the refresh counter 35 are simultaneously selected and a word line WLa indicated by the address signal RHRADD output from the row hammer address storing circuit 36 is selected from among the word lines WL included in the mats MAT4 to MAT7 as shown in
The operation mode of the refresh operation in response to the per-bank refresh command REFpb can be changed by the temperature signal TEMP shown in
The operations shown in
The bank control circuits 60 to 67 activate the internal signal CBR or RHR in response to the timing signals T0 to T5. As an example, when the state signal S indicates the operation shown in
Although this invention has been disclosed in the context of certain preferred embodiments and examples, it will be understood by those skilled in the art that the inventions extend beyond the specifically disclosed embodiments to other alternative embodiments and/or uses of the inventions and obvious modifications and equivalents thereof. In addition, other modifications which are within the scope of this invention will be readily apparent to those of skill in the art based on this disclosure. It is also contemplated that various combination or sub-combination of the specific features and aspects of the embodiments may be made and still fall within the scope of the inventions. It should be understood that various features and aspects of the disclosed embodiments can be combined with or substituted for one another in order to form varying mode of the disclosed invention. Thus, it is intended that the scope of at least some of the present invention herein disclosed should not be limited by the particular disclosed embodiments described above.
Claims
1. A method comprising: responsive to receiving a first external all-bank refresh command: sequentially performing a refresh operation on each bank of a first plurality of memory banks; and performing a first row hammer refresh operation on a memory bank different from the first plurality of memory banks, wherein the first row hammer refresh operation is initiated synchronously with the refresh operation on a first bank of the first plurality of memory banks.
2. The method of claim 1, further comprising, performing a second row hammer refresh operation on the memory bank after the first row hammer refresh operation.
3. The method of claim 1, further comprising performing a second row hammer refresh operation on the memory bank synchronously with the refresh operation on a last bank of the first plurality of memory banks.
4. The method of claim 1, wherein the memory bank different from the first plurality of memory banks is included in a second plurality of memory banks and the method further comprises performing the first row hammer refresh operation on each of the second plurality of memory banks.
5. The method of claim 1, further comprising: responsive to receiving a second external all-bank refresh command: sequentially performing the refresh operation on each bank of the first plurality of memory banks except for a last bank of the first plurality of memory banks; performing the refresh operation on the memory bank different from the first plurality of memory banks as if the memory bank was the last bank of the first plurality of memory banks; and performing the first row hammer refresh operation on the last bank of the first plurality of memory banks.
6. The method of claim 5, further comprising performing a second row hammer refresh operation on the last bank of the first plurality of memory banks after the first row hammer refresh operation.
7. The method of claim 5, further comprising incrementing a counter each time an external all-bank refresh command is received, wherein a value of the counter indicates on which banks of the first plurality of memory banks and the memory bank different from the first plurality of banks the refresh operation is performed and the first row hammer refresh operation is performed.
8. The method of claim 1, wherein sequentially performing the refresh operation on each bank of the first plurality of banks is performed responsive, at least in part, to a plurality of timing signals, wherein each of the timing signals has a different delay.
5299159 | March 29, 1994 | Balistreri et al. |
5654929 | August 5, 1997 | Mote, Jr. |
5699297 | December 16, 1997 | Yamazaki et al. |
5867442 | February 2, 1999 | Kim et al. |
5933377 | August 3, 1999 | Hidaka |
5943283 | August 24, 1999 | Wong et al. |
5956288 | September 21, 1999 | Bermingham et al. |
5959923 | September 28, 1999 | Matteson et al. |
5970507 | October 19, 1999 | Kato et al. |
5999471 | December 7, 1999 | Choi |
6002629 | December 14, 1999 | Kim et al. |
6011734 | January 4, 2000 | Pappert |
6061290 | May 9, 2000 | Shirley |
6064621 | May 16, 2000 | Tanizaki et al. |
6212118 | April 3, 2001 | Fujita |
6306721 | October 23, 2001 | Teo et al. |
6310806 | October 30, 2001 | Higashi et al. |
6310814 | October 30, 2001 | Hampel et al. |
6363024 | March 26, 2002 | Fibranz |
6392952 | May 21, 2002 | Chen et al. |
6424582 | July 23, 2002 | Ooishi |
6434064 | August 13, 2002 | Nagai |
6452868 | September 17, 2002 | Fister |
6515928 | February 4, 2003 | Sato et al. |
6535950 | March 18, 2003 | Funyu et al. |
6567340 | May 20, 2003 | Nataraj et al. |
6950364 | September 27, 2005 | Kim |
7002868 | February 21, 2006 | Takahashi |
7057960 | June 6, 2006 | Fiscus et al. |
7082070 | July 25, 2006 | Hong |
7187607 | March 6, 2007 | Koshikawa et al. |
7203113 | April 10, 2007 | Takahashi et al. |
7203115 | April 10, 2007 | Eto et al. |
7209402 | April 24, 2007 | Shinozaki et al. |
7215588 | May 8, 2007 | Lee |
7444577 | October 28, 2008 | Best et al. |
7551502 | June 23, 2009 | Dono et al. |
7565479 | July 21, 2009 | Best et al. |
7692993 | April 6, 2010 | Iida et al. |
7830742 | November 9, 2010 | Han |
8174921 | May 8, 2012 | Kim et al. |
8400805 | March 19, 2013 | Yoko |
8572423 | October 29, 2013 | Isachar et al. |
8625360 | January 7, 2014 | Iwamoto et al. |
8681578 | March 25, 2014 | Narui |
8756368 | June 17, 2014 | Best et al. |
8811100 | August 19, 2014 | Ku |
8862973 | October 14, 2014 | Zimmerman et al. |
8938573 | January 20, 2015 | Greenfield et al. |
9032141 | May 12, 2015 | Bains et al. |
9047978 | June 2, 2015 | Bell et al. |
9076499 | July 7, 2015 | Schoenborn et al. |
9087602 | July 21, 2015 | Youn et al. |
9117544 | August 25, 2015 | Bains et al. |
9123447 | September 1, 2015 | Lee et al. |
9153294 | October 6, 2015 | Kang |
9190137 | November 17, 2015 | Kim et al. |
9190139 | November 17, 2015 | Jung et al. |
9236110 | January 12, 2016 | Bains et al. |
9251885 | February 2, 2016 | Greenfield et al. |
9286964 | March 15, 2016 | Halbert et al. |
9299400 | March 29, 2016 | Bains et al. |
9311984 | April 12, 2016 | Hong |
9311985 | April 12, 2016 | Lee et al. |
9324398 | April 26, 2016 | Jones et al. |
9384821 | July 5, 2016 | Bains et al. |
9390782 | July 12, 2016 | Best et al. |
9396786 | July 19, 2016 | Yoon |
9406358 | August 2, 2016 | Lee |
9412432 | August 9, 2016 | Narui et al. |
9418723 | August 16, 2016 | Chishti et al. |
9424907 | August 23, 2016 | Fujishiro |
9484079 | November 1, 2016 | Lee |
9514850 | December 6, 2016 | Kim |
9570143 | February 14, 2017 | Lim et al. |
9570201 | February 14, 2017 | Morgan et al. |
9646672 | May 9, 2017 | Kim et al. |
9653139 | May 16, 2017 | Park |
9672889 | June 6, 2017 | Lee et al. |
9685240 | June 20, 2017 | Park |
9691466 | June 27, 2017 | Kim |
9697913 | July 4, 2017 | Mariani et al. |
9734887 | August 15, 2017 | Tavva |
9741409 | August 22, 2017 | Jones et al. |
9741447 | August 22, 2017 | Akamatsu |
9747971 | August 29, 2017 | Bains et al. |
9761297 | September 12, 2017 | Tomishima |
9786351 | October 10, 2017 | Lee et al. |
9799391 | October 24, 2017 | Wei |
9805782 | October 31, 2017 | Liou |
9805783 | October 31, 2017 | Ito et al. |
9812185 | November 7, 2017 | Fisch et al. |
9818469 | November 14, 2017 | Kim et al. |
9831003 | November 28, 2017 | Sohn et al. |
9865326 | January 9, 2018 | Bains et al. |
9865328 | January 9, 2018 | Desimone et al. |
9922694 | March 20, 2018 | Akamatsu |
9934143 | April 3, 2018 | Bains et al. |
9953696 | April 24, 2018 | Kim |
9978430 | May 22, 2018 | Seo et al. |
10020045 | July 10, 2018 | Riho |
10020046 | July 10, 2018 | Uemura |
10032501 | July 24, 2018 | Ito et al. |
10049716 | August 14, 2018 | Proebsting |
10083737 | September 25, 2018 | Bains et al. |
10090038 | October 2, 2018 | Shin |
10134461 | November 20, 2018 | Bell et al. |
10141042 | November 27, 2018 | Richter |
10147472 | December 4, 2018 | Jones et al. |
10153031 | December 11, 2018 | Akamatsu |
10170174 | January 1, 2019 | Ito et al. |
10192608 | January 29, 2019 | Morgan |
10210925 | February 19, 2019 | Bains et al. |
10297305 | May 21, 2019 | Moon et al. |
10297307 | May 21, 2019 | Raad et al. |
10339994 | July 2, 2019 | Ito et al. |
10381327 | August 13, 2019 | Ramachandra et al. |
10446256 | October 15, 2019 | Ong et al. |
10468076 | November 5, 2019 | He et al. |
10490250 | November 26, 2019 | Ito et al. |
10490251 | November 26, 2019 | Wolff |
10504577 | December 10, 2019 | Alzheimer |
10510396 | December 17, 2019 | Notani et al. |
10572377 | February 25, 2020 | Zhang et al. |
10573370 | February 25, 2020 | Ito et al. |
10607679 | March 31, 2020 | Nakaoka |
10685696 | June 16, 2020 | Brown et al. |
10699796 | June 30, 2020 | Benedict et al. |
10790005 | September 29, 2020 | He et al. |
10825505 | November 3, 2020 | Rehmeyer |
10832792 | November 10, 2020 | Penney et al. |
10930335 | February 23, 2021 | Bell et al. |
10943636 | March 9, 2021 | Wu et al. |
10950289 | March 16, 2021 | Ito et al. |
10957377 | March 23, 2021 | Noguchi |
10964378 | March 30, 2021 | Ayyapureddi |
10978132 | April 13, 2021 | Rehmeyer et al. |
11017833 | May 25, 2021 | Wu et al. |
11069393 | July 20, 2021 | Cowles et al. |
11081160 | August 3, 2021 | Ito et al. |
20010008498 | July 19, 2001 | Ooishi |
20020026613 | February 28, 2002 | Niiro |
20020181301 | December 5, 2002 | Takahashi et al. |
20020191467 | December 19, 2002 | Matsumoto et al. |
20030026161 | February 6, 2003 | Yamaguchi et al. |
20030063512 | April 3, 2003 | Takahashi et al. |
20030067825 | April 10, 2003 | Shimano et al. |
20030081483 | May 1, 2003 | De et al. |
20030123301 | July 3, 2003 | Jang et al. |
20030161208 | August 28, 2003 | Nakashima et al. |
20030193829 | October 16, 2003 | Morgan et al. |
20030231540 | December 18, 2003 | Lazar et al. |
20040004856 | January 8, 2004 | Sakimura et al. |
20040008544 | January 15, 2004 | Shinozaki et al. |
20040022093 | February 5, 2004 | Lee |
20040024955 | February 5, 2004 | Patel |
20040114446 | June 17, 2004 | Takahashi et al. |
20040130959 | July 8, 2004 | Kawaguchi |
20040184323 | September 23, 2004 | Mori et al. |
20040218431 | November 4, 2004 | Chung et al. |
20050002268 | January 6, 2005 | Otsuka et al. |
20050041502 | February 24, 2005 | Pemer |
20050105362 | May 19, 2005 | Choi et al. |
20050108460 | May 19, 2005 | David |
20050213408 | September 29, 2005 | Shieh |
20050243627 | November 3, 2005 | Lee et al. |
20050265104 | December 1, 2005 | Remaklus et al. |
20060018174 | January 26, 2006 | Park et al. |
20060083099 | April 20, 2006 | Bae et al. |
20060087903 | April 27, 2006 | Riho et al. |
20060104139 | May 18, 2006 | Hur et al. |
20060176744 | August 10, 2006 | Stave |
20060215474 | September 28, 2006 | Hokenmaier |
20060233012 | October 19, 2006 | Sekiguchi et al. |
20060262616 | November 23, 2006 | Chen |
20060262617 | November 23, 2006 | Lee |
20060268643 | November 30, 2006 | Schreck et al. |
20070002651 | January 4, 2007 | Lee |
20070008799 | January 11, 2007 | Dono et al. |
20070014175 | January 18, 2007 | Min et al. |
20070028068 | February 1, 2007 | Golding et al. |
20070030746 | February 8, 2007 | Best et al. |
20070033339 | February 8, 2007 | Best et al. |
20070147154 | June 28, 2007 | Lee |
20070237016 | October 11, 2007 | Miyamoto et al. |
20070263442 | November 15, 2007 | Cornwell et al. |
20070297252 | December 27, 2007 | Singh |
20080028260 | January 31, 2008 | Oyagi et al. |
20080031068 | February 7, 2008 | Yoo et al. |
20080126893 | May 29, 2008 | Harrand et al. |
20080130394 | June 5, 2008 | Dono et al. |
20080181048 | July 31, 2008 | Han |
20080212386 | September 4, 2008 | Riho |
20080224742 | September 18, 2008 | Pomichter |
20080253212 | October 16, 2008 | Iida et al. |
20080253213 | October 16, 2008 | Sato et al. |
20080266990 | October 30, 2008 | Loeffler |
20080270683 | October 30, 2008 | Barth et al. |
20080306723 | December 11, 2008 | De Ambroggi et al. |
20080316845 | December 25, 2008 | Wang et al. |
20090021999 | January 22, 2009 | Tanimura et al. |
20090052264 | February 26, 2009 | Hong et al. |
20090059641 | March 5, 2009 | Jeddeloh |
20090073760 | March 19, 2009 | Betser et al. |
20090161468 | June 25, 2009 | Fujioka |
20090168571 | July 2, 2009 | Pyo et al. |
20090185440 | July 23, 2009 | Lee |
20090201752 | August 13, 2009 | Riho et al. |
20090228739 | September 10, 2009 | Cohen et al. |
20090251971 | October 8, 2009 | Futatsuyama |
20090296510 | December 3, 2009 | Lee et al. |
20100005217 | January 7, 2010 | Jeddeloh |
20100005376 | January 7, 2010 | Laberge et al. |
20100061153 | March 11, 2010 | Yen |
20100074042 | March 25, 2010 | Fukuda et al. |
20100097870 | April 22, 2010 | Kim et al. |
20100110809 | May 6, 2010 | Kobayashi et al. |
20100110810 | May 6, 2010 | Kobayashi |
20100124138 | May 20, 2010 | Lee et al. |
20100128547 | May 27, 2010 | Kagami |
20100131812 | May 27, 2010 | Mohammad |
20100141309 | June 10, 2010 | Lee |
20100157693 | June 24, 2010 | Iwai et al. |
20100182862 | July 22, 2010 | Teramoto |
20100182863 | July 22, 2010 | Fukiage |
20100329069 | December 30, 2010 | Ito et al. |
20110026290 | February 3, 2011 | Noda et al. |
20110055495 | March 3, 2011 | Remaklus, Jr. et al. |
20110069572 | March 24, 2011 | Lee et al. |
20110122987 | May 26, 2011 | Neyer |
20110134715 | June 9, 2011 | Norman |
20110216614 | September 8, 2011 | Hosoe |
20110225355 | September 15, 2011 | Kajigaya |
20110299352 | December 8, 2011 | Fujishiro et al. |
20110310648 | December 22, 2011 | Iwamoto et al. |
20120014199 | January 19, 2012 | Narui |
20120059984 | March 8, 2012 | Kang et al. |
20120151131 | June 14, 2012 | Kilmer et al. |
20120155173 | June 21, 2012 | Lee et al. |
20120155206 | June 21, 2012 | Kodama et al. |
20120213021 | August 23, 2012 | Riho et al. |
20120254472 | October 4, 2012 | Ware et al. |
20120287727 | November 15, 2012 | Wang |
20120307582 | December 6, 2012 | Marumoto et al. |
20120327734 | December 27, 2012 | Sato |
20130003467 | January 3, 2013 | Klein |
20130003477 | January 3, 2013 | Park et al. |
20130028034 | January 31, 2013 | Fujisawa |
20130051157 | February 28, 2013 | Park |
20130051171 | February 28, 2013 | Porter et al. |
20130077423 | March 28, 2013 | Lee |
20130173971 | July 4, 2013 | Zimmerman |
20130254475 | September 26, 2013 | Perego et al. |
20130279284 | October 24, 2013 | Jeong |
20140006700 | January 2, 2014 | Schaefer et al. |
20140006703 | January 2, 2014 | Bains et al. |
20140006704 | January 2, 2014 | Greenfield et al. |
20140013169 | January 9, 2014 | Kobla et al. |
20140013185 | January 9, 2014 | Kobla et al. |
20140016422 | January 16, 2014 | Kim et al. |
20140022858 | January 23, 2014 | Chen et al. |
20140043888 | February 13, 2014 | Chen et al. |
20140050004 | February 20, 2014 | Mochida |
20140078841 | March 20, 2014 | Chopra |
20140078842 | March 20, 2014 | Oh et al. |
20140089576 | March 27, 2014 | Bains et al. |
20140089758 | March 27, 2014 | Kwok et al. |
20140095780 | April 3, 2014 | Bains et al. |
20140095786 | April 3, 2014 | Moon et al. |
20140119091 | May 1, 2014 | You et al. |
20140143473 | May 22, 2014 | Kim et al. |
20140169114 | June 19, 2014 | Oh |
20140177370 | June 26, 2014 | Halbert et al. |
20140181453 | June 26, 2014 | Jayasena et al. |
20140185403 | July 3, 2014 | Lai |
20140189228 | July 3, 2014 | Greenfield et al. |
20140219042 | August 7, 2014 | Yu |
20140219043 | August 7, 2014 | Jones et al. |
20140237307 | August 21, 2014 | Kobla et al. |
20140241099 | August 28, 2014 | Seo et al. |
20140254298 | September 11, 2014 | Dally |
20140281206 | September 18, 2014 | Crawford et al. |
20140281207 | September 18, 2014 | Mandava et al. |
20140293725 | October 2, 2014 | Best et al. |
20140321226 | October 30, 2014 | Pyeon |
20150016203 | January 15, 2015 | Sriramagiri et al. |
20150049566 | February 19, 2015 | Lee et al. |
20150049567 | February 19, 2015 | Chi |
20150055420 | February 26, 2015 | Bell et al. |
20150078112 | March 19, 2015 | Huang |
20150085564 | March 26, 2015 | Yoon et al. |
20150089326 | March 26, 2015 | Joo et al. |
20150092508 | April 2, 2015 | Bains |
20150109871 | April 23, 2015 | Bains et al. |
20150120999 | April 30, 2015 | Kim et al. |
20150134897 | May 14, 2015 | Sriramagiri et al. |
20150162064 | June 11, 2015 | Oh et al. |
20150162067 | June 11, 2015 | Kim |
20150170728 | June 18, 2015 | Jung |
20150199126 | July 16, 2015 | Jayasena et al. |
20150206572 | July 23, 2015 | Lim et al. |
20150213872 | July 30, 2015 | Mazumder et al. |
20150243339 | August 27, 2015 | Bell et al. |
20150255140 | September 10, 2015 | Song |
20150279442 | October 1, 2015 | Hwang |
20150294711 | October 15, 2015 | Gaither et al. |
20150340077 | November 26, 2015 | Akamatsu |
20150356048 | December 10, 2015 | King |
20150380073 | December 31, 2015 | Joo et al. |
20160019940 | January 21, 2016 | Jang et al. |
20160027498 | January 28, 2016 | Ware et al. |
20160027531 | January 28, 2016 | Jones et al. |
20160027532 | January 28, 2016 | Kim |
20160042782 | February 11, 2016 | Narui et al. |
20160070483 | March 10, 2016 | Yoon et al. |
20160078846 | March 17, 2016 | Liu et al. |
20160078911 | March 17, 2016 | Fujiwara et al. |
20160086649 | March 24, 2016 | Hong et al. |
20160093402 | March 31, 2016 | Kitagawa et al. |
20160125931 | May 5, 2016 | Doo et al. |
20160133314 | May 12, 2016 | Hwang et al. |
20160155491 | June 2, 2016 | Roberts et al. |
20160180917 | June 23, 2016 | Chishti et al. |
20160180921 | June 23, 2016 | Jeong |
20160196863 | July 7, 2016 | Shin et al. |
20160202926 | July 14, 2016 | Benedict |
20160225433 | August 4, 2016 | Bains et al. |
20160336060 | November 17, 2016 | Shin |
20160343423 | November 24, 2016 | Shido |
20170011792 | January 12, 2017 | Oh et al. |
20170052722 | February 23, 2017 | Ware et al. |
20170076779 | March 16, 2017 | Bains et al. |
20170092350 | March 30, 2017 | Halbert et al. |
20170111792 | April 20, 2017 | Correia Fernandes et al. |
20170133085 | May 11, 2017 | Kim et al. |
20170133108 | May 11, 2017 | Lee et al. |
20170140807 | May 18, 2017 | Sun et al. |
20170140810 | May 18, 2017 | Choi et al. |
20170140811 | May 18, 2017 | Joo |
20170146598 | May 25, 2017 | Kim et al. |
20170148504 | May 25, 2017 | Saifuddin et al. |
20170177246 | June 22, 2017 | Miller et al. |
20170186481 | June 29, 2017 | Oh et al. |
20170213586 | July 27, 2017 | Kang et al. |
20170221546 | August 3, 2017 | Loh et al. |
20170263305 | September 14, 2017 | Cho |
20170269861 | September 21, 2017 | Lu et al. |
20170287547 | October 5, 2017 | Ito et al. |
20170323675 | November 9, 2017 | Jones et al. |
20170345482 | November 30, 2017 | Balakrishnan |
20170352404 | December 7, 2017 | Lee et al. |
20180005690 | January 4, 2018 | Morgan et al. |
20180025770 | January 25, 2018 | Ito et al. |
20180025772 | January 25, 2018 | Lee et al. |
20180025773 | January 25, 2018 | Bains et al. |
20180033479 | February 1, 2018 | Lea et al. |
20180047110 | February 15, 2018 | Blackman et al. |
20180061476 | March 1, 2018 | Kim |
20180061483 | March 1, 2018 | Morgan |
20180061485 | March 1, 2018 | Joo |
20180075927 | March 15, 2018 | Jeong et al. |
20180082737 | March 22, 2018 | Lee |
20180096719 | April 5, 2018 | Tomishima et al. |
20180102776 | April 12, 2018 | Chandrasekar et al. |
20180107417 | April 19, 2018 | Shechter et al. |
20180108401 | April 19, 2018 | Choi et al. |
20180114561 | April 26, 2018 | Fisch et al. |
20180114565 | April 26, 2018 | Lee |
20180122454 | May 3, 2018 | Lee et al. |
20180130506 | May 10, 2018 | Kang et al. |
20180137005 | May 17, 2018 | Wu et al. |
20180158504 | June 7, 2018 | Akamatsu |
20180158507 | June 7, 2018 | Bang |
20180182445 | June 28, 2018 | Lee et al. |
20180190340 | July 5, 2018 | Kim et al. |
20180218767 | August 2, 2018 | Wolff |
20180226119 | August 9, 2018 | Kim et al. |
20180233197 | August 16, 2018 | Laurent |
20180240511 | August 23, 2018 | Yoshida et al. |
20180247876 | August 30, 2018 | Kim et al. |
20180254078 | September 6, 2018 | We et al. |
20180261268 | September 13, 2018 | Hyun et al. |
20180276150 | September 27, 2018 | Eckert et al. |
20180285007 | October 4, 2018 | Franklin et al. |
20180294028 | October 11, 2018 | Lee et al. |
20180308539 | October 25, 2018 | Ito et al. |
20180341553 | November 29, 2018 | Koudele et al. |
20190013059 | January 10, 2019 | Akamatsu |
20190043558 | February 7, 2019 | Suh et al. |
20190051344 | February 14, 2019 | Bell et al. |
20190065087 | February 28, 2019 | Li et al. |
20190066759 | February 28, 2019 | Nale |
20190066766 | February 28, 2019 | Lee |
20190088315 | March 21, 2019 | Saenz et al. |
20190088316 | March 21, 2019 | Inuzuka et al. |
20190103147 | April 4, 2019 | Jones et al. |
20190115069 | April 18, 2019 | Lai |
20190122723 | April 25, 2019 | Ito et al. |
20190129651 | May 2, 2019 | Wuu et al. |
20190130960 | May 2, 2019 | Kim |
20190130961 | May 2, 2019 | Bell et al. |
20190147964 | May 16, 2019 | Yun et al. |
20190161341 | May 30, 2019 | Howe |
20190190341 | June 20, 2019 | Beiseie et al. |
20190196730 | June 27, 2019 | Imran |
20190198078 | June 27, 2019 | Hoang et al. |
20190198099 | June 27, 2019 | Mirichigni et al. |
20190205253 | July 4, 2019 | Roberts |
20190228810 | July 25, 2019 | Jones et al. |
20190228815 | July 25, 2019 | Morohashi et al. |
20190252020 | August 15, 2019 | Rios et al. |
20190267077 | August 29, 2019 | Ito et al. |
20190279706 | September 12, 2019 | Kim |
20190294348 | September 26, 2019 | Ware et al. |
20190333573 | October 31, 2019 | Shin et al. |
20190348100 | November 14, 2019 | Smith et al. |
20190348102 | November 14, 2019 | Smith et al. |
20190348103 | November 14, 2019 | Jeong et al. |
20190362774 | November 28, 2019 | Kuramori et al. |
20190385661 | December 19, 2019 | Koo et al. |
20190385667 | December 19, 2019 | Morohashi et al. |
20190385668 | December 19, 2019 | Fujioka et al. |
20190385670 | December 19, 2019 | Notani et al. |
20190386557 | December 19, 2019 | Wang et al. |
20190391760 | December 26, 2019 | Miura et al. |
20190392886 | December 26, 2019 | Cox et al. |
20200005857 | January 2, 2020 | Ito et al. |
20200051616 | February 13, 2020 | Cho |
20200075086 | March 5, 2020 | Hou et al. |
20200082873 | March 12, 2020 | Wolff |
20200126611 | April 23, 2020 | Riho et al. |
20200135263 | April 30, 2020 | Brown et al. |
20200143871 | May 7, 2020 | Kim et al. |
20200176050 | June 4, 2020 | Ito et al. |
20200185026 | June 11, 2020 | Yun et al. |
20200194056 | June 18, 2020 | Sakurai et al. |
20200202921 | June 25, 2020 | Morohashi et al. |
20200210278 | July 2, 2020 | Rooney et al. |
20200211632 | July 2, 2020 | Noguchi |
20200211633 | July 2, 2020 | Okuma |
20200211634 | July 2, 2020 | Ishikawa et al. |
20200219555 | July 9, 2020 | Rehmeyer |
20200219556 | July 9, 2020 | Ishikawa |
20200265888 | August 20, 2020 | Ito et al. |
20200273517 | August 27, 2020 | Yamamoto |
20200273518 | August 27, 2020 | Raad et al. |
20200279599 | September 3, 2020 | Ware et al. |
20200294569 | September 17, 2020 | Wu et al. |
20200294576 | September 17, 2020 | Brown et al. |
20200321049 | October 8, 2020 | Meier et al. |
20200381040 | December 3, 2020 | Penney et al. |
20200388324 | December 10, 2020 | Rehmeyer et al. |
20200388325 | December 10, 2020 | Cowles et al. |
20200395063 | December 17, 2020 | Rehmeyer |
20210057021 | February 25, 2021 | Wu et al. |
20210057022 | February 25, 2021 | Jenkinson et al. |
20210118491 | April 22, 2021 | Li et al. |
20210166752 | June 3, 2021 | Noguchi |
20210183433 | June 17, 2021 | Jenkinson et al. |
20210183435 | June 17, 2021 | Meier et al. |
20210225431 | July 22, 2021 | Rehmeyer et al. |
20210304813 | September 30, 2021 | Cowles et al. |
101038785 | September 2007 | CN |
101067972 | November 2007 | CN |
104350546 | February 2015 | CN |
106710621 | May 2017 | CN |
107871516 | April 2018 | CN |
2005-216423 | August 2005 | JP |
2011-258259 | December 2011 | JP |
2011-258259 | December 2011 | JP |
4911510 | January 2012 | JP |
2013-004158 | January 2013 | JP |
6281030 | January 2018 | JP |
2014120477 | August 2014 | WO |
2015030991 | March 2015 | WO |
2017171927 | October 2017 | WO |
2019222960 | November 2019 | WO |
2020010010 | January 2020 | WO |
2020247163 | December 2020 | WO |
2020247639 | December 2020 | WO |
- International Search Report & Written Opinion dated Mar. 24, 2020 for PCT Application No. PCT/US2019/064028, 11 pages.
- U.S. Appl. No. 17/187,002 titled “Apparatuses and Methods for Staggered Timing of Targeted Refresh Operations” filed Feb. 26, 2021, pp. all.
- U.S. Appl. No. 16/797,658, titles “Apparatuses and Methods for Controlling Refresh Operations”, filed Feb. 21, 2020, pp. specification, claims, abstract, and figures of application as filed.
- U.S. Appl. No. 16/818,981 titled “Apparatuses and Methods for Staggered Timing of Targeted Refresh Operations” filed Mar. 13, 2020, pp. specification, claims, abstract, and figures of application as filed.
- U.S. Appl. No. 16/025,844, titled “Apparatus and Methods for Triggering Row Hammer Address Sampling”, filed Jul. 2, 2018, pp. specification, claims, abstract, and figures of application as filed.
- U.S. Appl. No. 16/783,063, titled “Apparatus and Methods for Triggering Row Hammer Address Sampling”, dated Feb. 5, 2020, pp. specification, claims, abstract, and figures of application as filed.
- U.S. Appl. No. 16/805,197, titled “Apparatuses and Methods for Calculating Row Hammer Refresh Addresses in a Semiconductor Device”, dated Feb. 28, 2020, pp. specification, claims, abstract, and figures of application as filed.
- U.S. Appl. No. 16/232,837, titled “Apparatuses and Methods for Distributed Targeted Refresh Operations”, filed Dec. 26, 2018, pp. specification, claims, abstract, and figures of application as filed.
- U.S. Appl. No. 16/818,989, titled “Semiconductor Device Performing Row Hammer Refresh Operation”, dated Mar. 13, 2020, pp. specification, claims, abstract, and figures of application as filed.
- U.S. Appl. No. 16/268,818, titled “Apparatuses and Methods for Managing Row Access Counts”, filed Feb. 6, 2019, pp. specification, claims, abstract, and figures of application as filed.
- U.S. Appl. No. 16/286,187 titled “Apparatuses and Methods for Memory Mat Refresh Sequencing” filed on Feb. 26, 2019, pp. specification, claims, abstract, and figures of application as filed.
- U.S. Appl. No. 16/084,119, titled “Apparatuses and Methods for Pure-Time, Self Adopt Sampling for Row Hammer Refresh Sampling”, filed Sep. 11, 2017, pp. specification, claims, abstract, and figures of application as filed.
- U.S. Appl. No. 16/886,284 titled “Apparatuses and Methods for Access Based Refresh Timing” filed May 28, 2020, pp. specification, claims, abstract, and figures of application as filed.
- U.S. Appl. No. 16/886,284, titled “Apparatuses and Methods for Access Based Refresh Timing”, dated May 28, 2020, pp. specification, claims, abstract, and figures of application as filed.
- U.S. Appl. No. 16/358,587, titled “Semiconductor Device Having CAM that Stores Address Signals”, filed Feb. 6, 2019, pp. specification, claims, abstract, and figures of application as filed.
- U.S. Appl. No. 16/375,716 titled “Apparatuses and Methods for Staggered Timing of Targeted Refresh Operations” filed on Apr. 4, 2019, pp. specification, claims, abstract, and figures of application as filed.
- U.S. Appl. No. 16/411,573 titled “Apparatuses, Systems, and Methods for a Content Addressable Memory Cell” filed May 14, 2019, pp. specification, claims, abstract, and figures of application as filed.
- U.S. Appl. No. 16/428,625 titled “Apparatuses and Methods for Tracking Victim Rows” filed May 31, 2019, pp. specification, claims, abstract, and figures of application as filed.
- U.S. Appl. No. 16/432,604 titled “Apparatuses and Methods for Staggered Timing of Skipped Refresh Operations” filed Jun. 5, 2019, pp. specification, claims, abstract, and figures of application as filed.
- U.S. Appl. No. 17/008,396 titled “Apparatuses and Methods for Staggered timing of Targeted Refresh Operations” filed Aug. 31, 2020, pp. specification, claims, abstract, and figures of application as filed.
- U.S. Appl. No. 16/513,400 titled “Apparatuses and Methods for Tracking Row Access” filed Jul. 16, 2019, pp. specification, claims, abstract, and figures of application as filed.
- U.S. Appl. No. 16/548,027 titled “Apparatuses, Systems and Methods for Analog Row Access Rate Determination” filed Jun. 5, 2019, pp. specification, claims, abstract, and figures of application as filed.
- U.S. Appl. No. 16/549,942 titled “Apparatuses and Methods for Lossy Row Access Counting” filed Aug. 23, 2019, pp. specification, claims, abstract, and figures of application as filed.
- U.S. Appl. No. 16/546,152 titled “Apparatuses and Methods for Analog Row Access Tracking” filed Aug. 20, 2019, pp. specification, claims, abstract, and figures of application as filed.
- U.S. Appl. No. 16/549,411 titled “Apparatuses and Methods for Dynamic Refresh Allocation” filed Aug. 23, 2019, pp. specification, claims, abstract, and figures of application as filed.
- U.S. Appl. No. 16/655,110 titled “Apparatuses and Methods for Dynamic Targeted Refresh Steals” filed Oct. 16, 2019, pp. specification, claims, abstract, and figures of application as filed.
- U.S. Appl. No. 17/186,913 titled “Apparatuses and Methods for Dynamic Refresh Allocation” filed Feb. 26, 2021, pp. specification, claims, abstract, and figures of application as filed.
- U.S. Appl. No. 17/187,002 titled “Apparatuses and Methods for Staggered Timing of Targeted Refresh Operations” filed Feb. 26, 2021, pp. specification, claims, abstract, and figures of application as filed.
- U.S. Appl. No. 17/347,957 titled “Apparatuses and Methods for Controlling Steal Rates” filed Jun. 15, 2021, pp. specification, claims, abstract, and figures of application as filed.
- U.S. Appl. No. 16/788,657 titled “Semiconductor Device Performing Row Hammer Refresh Operation”, dated Feb. 12, 2020, pp. specification, claims, abstract, and figures of application as filed.
- U.S. Appl. No. 17/324,621 titled “Apparatuses and Methods for Pure-Time, Self-Adopting Sampling for Row Hammer Refresh Sampling” filed May 19, 2021, pp. specification, claims, abstract, and figures of application as filed.
- U.S. Appl. No. 15/881,256 entitled ‘Apparatuses and Methods for Detecting a Row Hammer Attack with a Bandpass Filter’ filed on Jan. 26, 2018, pp. specification, claims, abstract, and figures of application as filed.
- U.S. Appl. No. 16/425,525 titled “Apparatuses And Methods For Tracking All Row Accesses” filed May 29, 2019, pp. specification, claims, abstract, and figures of application as filed.
- U.S. Appl. No. 16/427,105 titled “Apparatuses And Methods for Priority Targeted Refresh Operations” filed May 30, 2019, pp. specification, claims, abstract, and figures of application as filed.
- U.S. Appl. No. 16/427,140 titled “Apparatuses and Methods for Tracking Row Access Counts Between Multiple Register Stacks” filed May 30, 2019, pp. specification, claims, abstract, and figures of application as filed.
- U.S. Appl. No. 16/437,811 titled “Apparatuses, Systems, and Methods for Determining Extremum Numerical Values” filed Jun. 11, 2019, pp. specification, claims, abstract, and figures of application as filed.
- U.S. Appl. No. 16/537,891 titled “Apparatuses and Methods for Controlling Targeted Refresh Rates” filed Aug. 12, 2019, pp. specification, claims, abstract, and figures of application as filed.
- U.S. Appl. No. 16/994,338 titled “Apparatuses, Systems, and Methods for Memory Directed Access Pause” filed Aug. 14, 2020, pp. specification, claims, abstract, and figures of application as filed.
- U.S. Appl. No. 16/997,766 titled “Refresh Logic Circut Layouts Thereof” filed Aug. 19, 2020, pp. specification, claims, abstract, and figures of application as filed.
- U.S. Appl. No. 16/997,659 titled “Apparatuses, Systems, and Methods for Refresh Modes” filed Aug. 19, 2020, pp. specification, claims, abstract, and figures of application as filed.
- U.S. Appl. No. 17/095,978 titled “Apparatuses and Methods for Controlling Refresh Timing” filed Nov. 12, 2020, pp. specification, claims, abstract, and figures of application as filed.
- U.S. Patent Application 17/127,654 titled “Apparatuses and Methods for Row Hammer Based Cache Lockdown” filed Dec. 18, 2020, pp. specification, claims, abstract, and figures of application as filed.
- U.S. Appl. No. 17/175,485 titled “Apparatuses and Methods for Distributed Targeted Refresh Operations” filed Feb. 12, 202.1, pp. specification, claims, abstract, and figures of application as filed.
- U.S. Appl. No. 15/789,897, entitled “Apparatus and Methods for Refreshing Memory”, filed Oct. 20, 2017, pp. specification, claims, abstract, and figures of application as filed.
- U.S. Appl. No. 15/796,340, entitled: “Apparatus and Methods for Refreshing Memory” filed on Oct. 27, 2017, pp. specification, claims, abstract, and figures of application as filed.
- U.S. Appl. No. 16/012,679, titled “Apparatuses and Methods for Multiple Row Hammer Refresh Address Sequences”, filed Jun. 19, 2018, pp. specification, claims, abstract, and figures of application as filed.
- U.S. Appl. No. 16/020,863, titled “Semiconductor Device”, filed Jun. 27, 2018, pp. specification, claims, abstract, and figures of application as filed.
- U.S. Appl. No. 16/112,471 titled “Apparatuses and Methods for Controlling Refresh Operations” filed Aug. 24, 2018, pp. specification, claims, abstract, and figures of application as filed.
- U.S. Appl. No. 16/160,801, titled “Apparatuses and Methods for Selective Row Refreshes” filed on Oct. 15, 2018, pp. specification, claims, abstract, and figures of application as filed.
- U.S. Appl. No. 16/176,932, titled “Apparatuses and Methods for Access Based Refresh Timing”, filed Oct. 31, 2018, pp. specification, claims, abstract, and figures of application as filed.
- U.S. Appl. No. 16/230,300, titled “Apparatuses and Methods for Staggered Timing of Targeted Refresh Operations” filed Dec. 21, 2018, pp. specification, claims, abstract, and figures of application as filed ,.
- U.S. Appl. No. 16/231,327 titled “Apparatuses and Methods for Selective Row Refreshes”, filed on Dec. 21, 2018, pp. specification, claims, abstract, and figures of application as filed.
- U.S. Appl. No. 16/237,291, titled “Apparatus and Methods for Refreshing Memory”, filed Dec. 31, 2018, pp. specification, claims, abstract, and figures of application as filed.
- U.S. Appl. No. 16/290,730, titled “Semiconductor Device Performing Row Hammer Refresh Operation”, filed Mar. 1, 2019, pp. specification, claims, abstract, and figures of application as filed.
- U.S. Appl. No. 16/374,623, titled “Semiconductor Device Performing Row Hammer Refresh Operation”, filed Apr. 3, 2019, pp. specification, claims, abstract, and figures of application as filed.
- U.S. Appl. No. 16/411,698 title “Semiconductor Device” filed May 14, 2019, pp. specification, claims, abstract, and figures of application as filed.
- U.S. Appl. No. 16/427,330 titled “Apparatuses and Methods for Storing Victim Row Data” filed May 30, 2019, pp. specification, claims, abstract, and figures of application as filed.
- U.S. Appl. No. 16/431,641 titled “Apparatuses and Methods for Controlling Steal Rates” filed Jun. 4, 2019, pp. specification, claims, abstract, and figures of application as filed.
- U.S. Appl. No. 16/682,606, titled “Apparatuses and Methods for Distributing Row Hammer Refresh Events Across a Memory Device ”, filed Nov. 13, 2019, pp. specification, claims, abstract, and figures of application as filed.
- U.S. Appl. No. 15/876,566 entitled ‘Apparatuses and Methods for Calculating Row Hammer Refresh Addresses in a Semiconductoe Device ’ filed on Jan. 22, 2018, pp. specification, claims, abstract, and figures of application as filed.
- U.S. Appl. No. 15/656,084, titled “Apparatuses and Methods for Targeting Refreshing ogf Memory”, filed Jul. 21, 2019, pp. specification, claims, abstract, and figures of application as filed.
- U.S. Appl. No. 17/226,975, titled “Apparatuses and Methods for Staggered Timing of Skipped Refresh Operations” filed Apr. 9, 2021, pp. specification, claims, abstract, and figures of application as filed.
- U.S. Appl. No. 16/459,520 titled “Apparatuses and Methods for Monitoring Word Line Accesses”, filed Jul. 1, 2019, pp. specification, claims, abstract, and figures of application as filed.
- U.S. Appl. No. 155/715,846, entitled “Semiconductor Device”, filed Sep. 26, 2017, pp. specification, claims, abstract, and figures of application as filed.
- U.S. Appl. No. 15/888,993, entitled “Apparatuses and Methods for Controlling Refresh Operations”, filed Feb. 5, 2018, pp. specification, claims, abstract, and figures of application as filed.
- U.S. Appl. No. 16/190,627 titled “Apparatuses and Methods for Targeted Refreshing of Memory” filed Nov. 14, 2018, pp. specification, claims, abstract, and figures of application as filed.
- U.S. Appl. No. 17/030,018, titled “Apparatuses and Methods for Controlling Refresh Operations”, filed Sep. 23, 2020, pp. specification, claims, abstract, and figures of application as filed.
- U.S. Appl. No. 15/281,818, titled “Semiconductor Device” filed on Sep. 30, 2016, pp. specification, claims, abstract, and figures of application as filed.
- U.S. Appl. No. 17/654,035, titled “Apparatuses and Methods for Dynamic Targeted Refresh Steals”, filed Mar. 8, 2022; pp. all pages of application as filed.
Type: Grant
Filed: Mar 19, 2020
Date of Patent: Apr 26, 2022
Patent Publication Number: 20200219556
Assignee: Micron Technology, Inc. (Boise, ID)
Inventors: Toru Ishikawa (Sagamihara), Takuya Nakanishi (Hino), Shinji Bessho (Hachioji)
Primary Examiner: Tha-O H Bui
Application Number: 16/824,460
International Classification: G11C 7/00 (20060101); G11C 11/406 (20060101); G11C 11/4076 (20060101); G11C 11/408 (20060101);